Инструкция для ZYXEL NXC5200

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Chapter 21 IDP

NXC5200 User’s Guide

321

21.7 Custom Signatures

Select Configuration > Anti-X > IDP > Custom Signatures. The first screen
shows a summary of all custom signatures created. Click the SID or Name
heading to sort. Click the Add icon to create a new signature or click the Edit icon
to edit an existing signature. You can also delete custom signatures here or save
them to your computer.

Protocol

The protocol indicates the type of transport packet being carried,
for example, 1 = ICMP; 2= IGMP; 6 = TCP; 17= UDP.

Header Checksum

This is used to detect processing errors introduced into the packet
inside a router or bridge where the packet is not protected by a link
layer cyclic redundancy check. Packets with an invalid checksum
are discarded by all nodes in an IP network.

Source IP Address

This is the IP address of the original sender of the packet.

Destination IP
Address

This is the IP address of the final destination of the packet.

Options

IP options is a variable-length list of IP options for a datagram that
define IP Security Option, IP Stream Identifier, (security and
handling restrictions for the military), Record Route (have each
router record its IP address), Loose Source Routing (specifies a
list of IP addresses that must be traversed by the datagram),
Strict Source Routing (specifies a list of IP addresses that must
ONLY be traversed by the datagram), Timestamp (have each
router record its IP address and time), End of IP List and No IP
Options.